Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 423 [Rate centres in NPA 423] [Dial plan for NPA 423]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
423-279 5 Blountville TN JHCYTNXCXAY  073H TELNYX LLC 956   2021-01-17   
423-279 6 Blountville TN BUVLTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-279 7 Blountville TN BUVLTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-279 8 Blountville TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2021-11-28   
423-279 9 Blountville TN BUVLTNXARS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-280 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-281 A Butler TN BUVLTNAX0MD  792K CHARTER IP ENABLED SERVICES, LLC 956      
423-281 0 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2012-08-24   
423-281 1 Butler TN BUVLTNAX0MD  792K CHARTER IP ENABLED SERVICES, LLC 956   2011-12-16   
423-281 2 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2015-09-10   
423-281 3 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2015-11-16   
423-281 4 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-05-29   
423-281 5 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-05-29   
423-281 6 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-09-15   
423-281 7 Butler TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2014-04-19   
423-281 8 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2017-09-15   
423-281 9 Butler TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2018-05-17   
423-282 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-283 A Johnson City TN JHCYTNXCPS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-284 A Cleveland TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 A Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 0 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 1 Dayton TN CHTGTNNS04Z  829J PAETEC ITEL, LLC 472   2006-07-15   
423-285 2 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2006-09-16   
423-285 3 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 4 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 5 Dayton TN   792K CHARTER IP ENABLED SERVICES, LLC 472   2006-06-03   
423-285 6 Dayton TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2008-05-26   
423-285 7 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472      
423-285 8 Dayton TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472   2004-11-15   
423-285 9 Dayton TN CHTGTNGZ4MD  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 472   2007-02-24   
423-286 A Oneida TN ONEDTNXADS1  0565 HIGHLAND TEL. COOP, INC. 474      
423-287 A Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-287 0 Chattanooga TN CHTGTNNSXMZ  624H ONVOY SPECTRUM, LLC 472   2022-08-08   
423-287 1 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-287 2 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-287 3 Chattanooga TN CHTGTNNSXNZ  197D VONAGE AMERICA LLC 472   2023-10-13   
423-287 4 Chattanooga TN CHTGTNNSXKY  525E ONVOY, LLC - TN 472   2024-01-14   
423-287 5 Chattanooga TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2022-02-25   
423-287 6 Chattanooga TN CHTITNCDDS0  4645 ELECTRIC POWER BOARD OF CHATTANOOGA 472   2022-02-25   
423-287 8 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-287 9 Chattanooga TN CHTGTNNSDS1  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 472      
423-288 A Kingsport TN KGPTTNXCRS0  4510 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN 956      
423-289 A Morristown TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-289 0 Morristown TN KNVLTNMAYAY  829J PAETEC ITEL, LLC 474   2004-03-27   
423-289 1 Morristown TN KNVLTNMAYAY  829J PAETEC ITEL, LLC 474   2010-04-23   
423-289 2 Morristown TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2011-03-13   
423-289 3 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2008-06-10   
423-289 4 Morristown TN KNVLTNMA49Z  525E ONVOY, LLC - TN 474   2008-06-16   
423-289 5 Morristown TN KNVNTNEC5MD  145J TERRA NOVA TELECOM INC. 474   2024-12-29   
423-289 9 Morristown TN   145J TERRA NOVA TELECOM INC. 474   2022-06-03   
423-290 A Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-290 0 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-04-02   
423-290 1 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-04-02   
423-290 2 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-06-01   
423-290 3 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-06-01   
423-290 4 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-06-01   
423-290 5 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-07-14   
423-290 6 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-07-14   
423-290 7 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-07-14   
423-290 8 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472   2004-08-05   
423-290 9 Chattanooga TN CHTGTN12X5Y  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 472      
423-291 A Mountain City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-291 0 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2004-11-20   
423-291 1 Mountain City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-291 2 Mountain City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2006-01-03   
423-291 3 Mountain City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956   2007-05-22   
423-291 4 Mountain City TN JHCYTNXC9MD  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 956   2006-01-30   
423-291 5 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2007-03-22   
423-291 6 Mountain City TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2011-07-04   
423-291 7 Mountain City TN JHCYTNXCXYX  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 956   2009-02-19   
423-291 8 Mountain City TN JHCYTNXCXNX  124F BANDWIDTH.COM CLEC, LLC - TN 956   2010-06-19   
423-291 9 Mountain City TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-292 A Fall Branch TN JHCYTNXCX2Y  8645 SUNCOM DBA T-MOBILE USA 956      
423-293 A Rogersville TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-293 0 Rogersville TN MRTWTN281MD  792K CHARTER IP ENABLED SERVICES, LLC 474   2005-05-23   
423-293 1 Rogersville TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2005-01-28   
423-293 2 Rogersville TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2006-08-05   
423-293 3 Rogersville TN MRTWTN281MD  792K CHARTER IP ENABLED SERVICES, LLC 474   2008-02-20   
423-293 4 Rogersville TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2007-02-03   
423-293 5 Rogersville TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474   2007-03-11   
423-293 6 Rogersville TN KNVLTNMA96Z  5562 METROPCS, INC. 474   2010-07-23   
423-293 7 Rogersville TN KNVLTNMA54Z  114F TELEPORT COMMUNICATIONS AMERICA, LLC - TN 474   2009-03-13   
423-293 8 Rogersville TN KNVLTNIIAMD  6673 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 474   2012-09-12   
423-293 9 Rogersville TN KNVLTNMA96Z  7476 POWERTEL NASHVILLE LICENSES, INC. 474      
423-294 A Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 0 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 1 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 2 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 3 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 4 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 5 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 6 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 7 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 8 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-294 9 Chattanooga TN CHTGTNNSX8X  4806 LEVEL 3 COMMUNICATIONS, LLC - TN 472      
423-295 A Ball Play TN BLPLTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-295 0 Ball Play TN BLPLTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-295 2 Ball Play TN BLPLTNXARP0  0578 TELLICO TEL. CO., INC. 474      
423-295 4 Ball Play TN KNVLTNMA31Z  6278 UNITED STATES CELLULAR - TN 474      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.